Leonard Hayflick, Who Discovered Why No One Lives Forever, Dies at 98
Briefly

"In the early 1960s, while trying to develop healthy embryonic cell lines, I discovered that somatic cells have a division limit of 40 to 60 before senescence occurs."
"He demonstrated that, unlike somatic cells, cancer cells do not undergo senescence, leading to the insight that human life span is capped by this biological clock."
Read at www.nytimes.com
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